Cathode active material and manufacturing method thereof
US10862119B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2018 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | Nov 15, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a cathode active material for a secondary battery and a preparation method thereof, and more particularly, to a lithium composite oxide including a secondary particle formed as primary particles cohere, in which a manganese (Mn) oxide is present in the periphery of the primary particles, a concentration of an Mn oxide in the primary particle has a concentration gradient from the center of the primary particle to a surface of the particle, a concentration of an Mn oxide in the secondary particle has a concentration gradient from a surface of the secondary particle to the center thereof, and a lithium ion migration path is formed in the primary particle, and a preparation method thereof. A secondary battery including the cathode active material for a secondary battery may have high safety, while exhibiting high capacity and high output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.